Eight competing designs for a memorial to the nearly-3,000 victims of September 11 terror attacks – including reflecting pools, walls of names and a tomb for the unidentified – were unveiled as the rebuilding of New York’s World Trade Centre entered a delicate new phase.

The structure which will replace New York’s twin towers could stand more than 2,000ft high, dwarfing the world’s tallest buildings, it was reported today.

A PLAN calling for soaring “gardens in the sky” and a submerged memorial was unveiled yesterday for the World Trade Center site, but wrangling between leaseholders, politicians and September 11 victims’ relatives will ultimately decide what fills the space.

A complex of angular buildings and a 1,776ft spire designed by Berlin-based architect Daniel Libeskind has been chosen as the plan for the World Trade Centre site.

Former New York mayor Rudolph Giuliani today criticised the new plans for the World Trade Centre site, saying the proposals failed to convey “the horrific nature of the attack that took place.”

SKYSCRAPERS even taller than the 110-storey World Trade Center towers, along with a variety of memorials from twin reflecting pools to a Park of Heroes, were among the proposals unveiled yesterday for rebuilding Ground Zero.

The six blueprints for the redevelopment of Ground Zero were today criticised for lacking imagination and being driven by ‘‘hard economics’’ rather than concerns for the area.

Six similar plans for the redevelopment of Ground Zero were unveiled today, with none including structures as tall as the twin towers.

A rebuilt World Trade Centre should be tall enough to act as a ‘‘powerful symbol’’ of America’s strength, new guidelines from the site’s developers said today.

Rudy Giuliani has called for a "grand, soaring memorial" at Ground Zero after his successor was criticised for backing a more simple structure.

New York Mayor Mike Bloomberg has angered families of September 11 victims by calling for a smaller Ground Zero memorial.

A blueprint for the future of the World Trade Centre site is expected by December 1, New York city and state officials said.

The Tribute of Light memorial to the World Trade Centre victims will go dark this weekend despite a campaign to keep it on, organisers said today.

Reports say a memorial for the World Trade Centre victims may include a glass structure inscribed with all their names.

The clean-up of the site of the collapsed World Trade Centre will be finished by June.